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Kinect

The device uses various cameras and microphones to track player movement and audio, allowing for what the company calls a "controller-free" experience.
At the Tokyo Game Show last month, top-tier publishers and developers including Activision, Bethesda, Capcom, Disney, EA, Konami, MTV, Namco Bandai, Sega, Square Enix, THQ and Ubisoft committed to design games for the device.

The SDK will be available mid 2011, which allows development of applications using the kinect.